Knob-lock



'('No Modell) L1. A..SELLEGK & G. J.A KEBNAN.

KNOB' LOCK,

' No. 377.815. Patented Feb; 14, 1888.

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IHIIIIIIHIIIMI HIIIIIIIIIV UNITED STATES PATENT OFFICE.

LLOYD A. SELLECK AND GEORGE J. KEENAN, BROOKLYN, MICHIGAN.

KNOB-Look.

SPECIFICATION forming part Letters Patent No. 377.815; dated February14,1888. v

u `.Application led September 29, 1887. Serial No. v251,078. (No model.)

y To a/ZZ whom, it may concern:

Be it known that we, LLOYD A. SELLECK y and GEORGE J. KEENAN, citizensof the United States, residing at Brooklyn, in the county of Jackson andState of Michigan, have invented certain new and useful ImprovementsinKnob- Locks, of which the following is a specification.

Our invention relates to improvements in knob-locks; and it consists ina certain novel construction, hereinafter described and claimed.

In the accompanying drawings, which fully illustrate our invention,Figure l is a perspective View of our improved device applied to adoor-knob. Fig..2 is a vertical section on the line x x of Fig. 1. Fig.3 is a rear elevation of the rosette and the sliding bolt. Fig. 4 isadetail perspective View of the rosette, looking at the front sidethereof; and Fig. 5 is a detail perspective view of the rosette.

Referring particularly to the drawings by letter, A designates thedoor-knob, secured to the spindle B of the lock by a screw, C, in theusual' manner.

D represents the rosette secured to the side of the door around thespindle and provided on its rear side with a' central circular recess,E, and in the base of this recess weform the groove F, extendingdiametrically across the same.

the central opening in the rosette, and on the opposite side of saidcentral opening on one of the sidewalls of the diametric groove weprovide the stop or projection H, which serves to limit the movement ofthe bolt, so that it cannot be pushed down on the spindle so hard as towear away the surface of the top ofthe spindle, thereby weakening thesaine. A coiled spring, I, is arranged in the lateral recess G, andbears against the side of the bolt to hold it to its place. In the sideof the rosette at the end of the groove F beyond the recess G we form anopening, J, through which the shank of the bolt Kprojects. This bolt Kconsists of a short bar, L, forming its shank or body, and provided atits upper end with a lateral integral projection, M,forming a han In oneofthe side walls of this groovel lFwe form a lateral recess, G, to oneside of ent, is-

lip, O, which projects over the recess G and' holds the spring Itherein.

It will be observed that the shank of the bolt isnot as wide as the yokeand the opening J is narrower than the groove F. By this. constructionthe withdrawal of the boltis prey Vented by the shoulders P of the yokecontacting with the end walls of the groove. The arms of the yoke restagainst the side walls of the groove and the bolt is guidedin itsmovementsthereby. The lip O projects over the side wall of the .grooveand playsin the recess E. The rear side of the bolt rests against theface of the door and the front of the same against the base of thegroove F in the rosette. It will thus be seen that we have provided avery simpledevice by which the spindle'may be prevented from turningwhen the door has been closed and latched.

The operation of our device is thoughtto be clear from the foregoingdescription, taken in connection with the accompanying drawings, andfurther reference thereto is deemed unnecessary. Y

/Having thus described our invention, what we claim, and desire tosecure by Letters Paty `In a knob-lock, the combination of the rosettehaving the groove F, andthe recess G and stop H in the walls of thesaidgroove, the spindle inserted through the rosette, the spring arranged inthe recess G, and the bolt sliding in the groove F and provided at itsupper end with an integral lateral projection, M, and at its lower endwith a yoke adapted to engage the spindle, one of the arms of said yokehaving a lip, O, substantially as specified.

LLOYD A. SELLEOK. GEORGE J. KEENAN.

Witnesses: l v

ALBERT M. LAMB, CHAs. A. HENDERsHorT.

die. At its lower end the shank is provided 5o

